.nav {
    position: fixed;
    height: 30px;
    top: 0px;
    left: 0;
    right: 0;
    z-index: 99;
    background-color: #fff;
    border-bottom: 1px solid #eee;
    text-align: center;
    display: flex;
    justify-content: space-around;
    align-items: center;
   .icon{
    width: 20px;
    height: 20px;
   }
   .left,.right{
    display:flex;
    align-items: center;
   }
   .content{
    width: calc(100% - 100px);
    background-color: pink;
    height: 20px;
    border-radius: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 10px;
    .icon{
        width: 20px;
        height: 20px;
    }
   }

}